Cite

Untitled [Spiral-bound "Blue Book" sketchbook]

MLA

Steinberg, Saul, 1914-1999. Untitled [Spiral-bound "Blue Book" sketchbook]. Box 489, folder 6915. undated. https://collections.library.yale.edu/catalog/2016840.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 489, folder 6915"])(undated)[Untitled [Spiral-bound "Blue Book" sketchbook]]. https://collections.library.yale.edu/catalog/2016840.